Whenever they were old enough to crack open the huge "MAD Bathroom Companion" that has been a bathroom reading staple along with the latest
National Geographic for decades lol
I have... with few exceptions (water damage... collage orojects)... an unbroken subscription to
Nat Geo going back to the late 60's
Loved MAD as a kid, LOL... Spy vs Spy. Still have a few of the softcover compilation books floating around in the bookshelves